CVE-2021-26621

Name: CVE-2021-26621
Creator: NVD / NIST
Published: 2022-03-25T19:15:08.77+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.63%

Last modified Jun 17, 2026

CVE-2021-26621 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An Buffer Overflow vulnerability leading to remote code execution was discovered in MEX01. Remote attackers can use this vulnerability by using the property that the target program copies parameter values to memory through the strcpy() function.. EPSS estimates a 1.63% chance of exploitation in the next 30 days.

Description

An Buffer Overflow vulnerability leading to remote code execution was discovered in MEX01. Remote attackers can use this vulnerability by using the property that the target program copies parameter values to memory through the strcpy() function.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.63%

73.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Netu	Mex01 Firmware	< 1.9.18

References

https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66579Third Party Advisory
https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66579Third Party Advisory

Timeline

Published: Mar 25, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26621?

How severe is CVE-2021-26621?

CVE-2021-26621 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.63% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26621?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-26621?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST